The Coat Protein Complex II, or COPII, is a group of proteins that facilitate the formation of vesicles to transport proteins from the endoplasmic reticulum to the Golgi apparatus or endoplasmic-reticulum–Golgi intermediate compartment.

Long known as a coat system that generates small transport vesicles from the endoplasmic reticulum (ER), the COPII coat also drives ER export of cargo proteins that are too large to be contained within these canonical carriers.

Dec 22, 2011 · In this review we cover aspects of mammalian COPII-mediated regulation of secretion, in particular related to the function of COPII paralogues, the spatial organization of cargo export and the...

COPI is present in the cytosol as a large heptameric complex composed of the α, β, β′, γ, δ, ε and ζ subunits.

Congenital dyserythropoietic anemia type II (CDAII) and combined deficiency of coagulation factors V and VIII (F5F8D) are the 2 known hematologic diseases that result from defects in the endoplasmic reticulum (ER)–to–Golgi transport system.

Here we describe progress towards a full mechanistic understanding of COPII coat function, including the latest findings in this area. Much of our understanding of how COPII functions and is regulated comes from studies of yeast genetics, biochemical …

Jan 1, 2011 · Coat protein complex II (COPII) is a set of highly conserved proteins that is responsible for creating small membrane vesicles that originate from the endoplasmic reticulum (ER) (Lee et al., 2004; Barlowe et al., 1994). The formation and movement of these COPII-derived vesicles is a crucial first step in the cellular secretion pathway, through ...

Nov 7, 2024 · Using cryo-electron tomography with subtomogram averaging, we demonstrate that the COPII coat binds cargo and forms largely spherical vesicles from native membranes. We reveal the architecture of...

Apr 1, 2021 · Here we visualise the complete, membrane-assembled COPII coat by cryo-electron tomography and subtomogram averaging, revealing the full network of interactions within and between coat layers. We...

Sep 17, 2013 · A structure of the complete, membrane bound, COPII coat solved by sub-tomogram averaging reveals the arrangement of all protein subunits on the membrane and suggests a mechanism for coating heterogeneously-shaped carriers.